Toy Cannon, patent, March 14, 1916; (https://texashistory.unt.edu/ark:/67531/metapth857958/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Toy Cannon, patent, March 14, 1916; (https://texashistory.unt.edu/ark:/67531/metapth857958/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .